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| author | Hans-Peter Nilsson <hp@axis.com> | 2020-01-23 02:30:49 +0100 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@axis.com> | 2020-05-09 03:37:10 +0200 |
| commit | 27228024598c3515389cdb378346433fb2c48551 (patch) | |
| tree | 2e78ae1c78d03f3b806720fdf599ba55c99b4c69 | |
| parent | fb062a8b7bca66243d52213a897c7a241f2b14e1 (diff) | |
| download | gcc-27228024598c3515389cdb378346433fb2c48551.zip gcc-27228024598c3515389cdb378346433fb2c48551.tar.gz gcc-27228024598c3515389cdb378346433fb2c48551.tar.bz2 | |
cris: Emit trivial btstq expected by gcc.target/cris/sync-2i.c, sync-2c.c
As the added FIXME says, the new insn_and_split generates only a
small subset of the bit-tests that can be matched by "*btst" and
that were emitted by the undecc0rated cris.md at combine-time,
but it's naturally separable from a general variant by being
just what's needed for the test-cases that were previously
xfailed, and that no additional CCmodes are required.
gcc:
PR target/93372
* config/cris/cris.md (zcond): New code_iterator.
("*cbranch<mode>4_btstq<CC>"): New insn_and_split.
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/config/cris/cris.md | 27 |
2 files changed, 31 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4abfbbe..915a007 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -34,6 +34,10 @@ (cris_emit_insn): New function. * cris/cris-protos.h (cris_emit_insn): Declare. + PR target/93372 + * config/cris/cris.md (zcond): New code_iterator. + ("*cbranch<mode>4_btstq<CC>"): New insn_and_split. + 2020-05-08 Vladimir Makarov <vmakarov@redhat.com> * ira-color.c (update_costs_from_allocno): Remove diff --git a/gcc/config/cris/cris.md b/gcc/config/cris/cris.md index 7690d7f..0b42197 100644 --- a/gcc/config/cris/cris.md +++ b/gcc/config/cris/cris.md @@ -178,6 +178,7 @@ (define_code_attr shlr [(ashiftrt "ashr") (lshiftrt "lshr") (ashift "ashl")]) (define_code_attr slr [(ashiftrt "asr") (lshiftrt "lsr") (ashift "lsl")]) +(define_code_iterator zcond [eq ne]) (define_code_iterator ncond [eq ne gtu ltu geu leu]) (define_code_iterator ocond [gt le]) (define_code_iterator rcond [lt ge]) @@ -1934,6 +1935,32 @@ (pc)))] "") +;; FIXME: this matches only a subset of what the "*btst" pattern can handle. +(define_insn_and_split "*cbranch<mode>4_btstq<CC>" + [(set (pc) + (if_then_else + (zcond + (zero_extract:BWD + (match_operand:BWD 0 "register_operand" "r") + (match_operand 1 "const_int_operand" "Kc") + (const_int 0)) + (const_int 0)) + (label_ref (match_operand 2 "")) + (pc))) + (clobber (reg:CC CRIS_CC0_REGNUM))] + "" + "#" + "&& reload_completed" + [(set (reg:CC CRIS_CC0_REGNUM) + (compare:CC + (zero_extract:SI (match_dup 0) (match_dup 1) (const_int 0)) + (const_int 0))) + (set (pc) + (if_then_else (zcond (reg:CC CRIS_CC0_REGNUM) (const_int 0)) + (label_ref (match_dup 3)) + (pc)))] + "") + ;; We suffer from the same overflow-bit-gets-in-the-way problem as ;; e.g. m68k, so we have to check if overflow bit is set on all "signed" |